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Boiler SafetyDeveloped by Western Iowa Tech Community College
This material was produced under a grant (SH-16634-07-60-F-19) from the Occupational Safety and Health Administration, U.S.
Department of Labor. It does not necessarily reflect the views or policies of the U.S. Department of Labor, nor does the mention
or trade names, commercial products, or organization imply endorsement by the U.S. government.
Boiler Room HazardsA Risk Of Explosion ExistsHigh Pressure steamCombustion GasesChemicalsMoving MachineryHot Surfaces
Communication is CriticalBoiler operation information is communicated to the boiler operator starting the shift to specify any special procedures required.
Boiler LogThe boiler room log lists boiler operation data that can be used to increase boiler safety and efficiency as well as identifying a potential malfunction.
Water LevelThe Normal Operating Water Level (NOWL) should be approximately in the middle of the gauge glass.
Try Cocks
Try Cocks
Try cocks are used to determine the boiler water level if the gauge glass is not functional.
Water Column And Gauge Glass Blowdown
The water column is blown down first and then the gauge glass to remove any sediment. Water should enter the gauge glass quickly when the gauge glass blowdown valve is closed.
Safety Valve Test Safety valves are routinely tested to ensure proper operation and must be serviced by an authorized manufacturer representative.
Burner Control System
The safety devices are all wired through a burner controller. This will shutdown the fuel supply to the burner.
Flame Scanner TestWhen testing the flame scanner, the flame scanner sensor is covered to simulate a flame failure.
Water Treatment
Water must be treated for safety. Minerals can cause a build up of deposits and cause overheating of boiler parts.
Carryover &
Carryover occurs when a high boiler water level causes water particles to be carried into steam lines.
Bottom Blowdown
During a bottom blowdown, the boiler should be under light load and the water level should be at the NOWL.
Handhole CoversManhole and handhole covers are removed to provide access to boiler parts during a boiler inspection.
Pumps and Other Equipment
Pumps should be checked periodically to ensure proper bearing temperatures and checked for any unusual vibration. Do not wear loose clothing around moving parts.
Steam Traps
Steam traps are checked for proper operation when determining the cause of a steambound feedwater pump.
Protective Clothing
A face shield along with safety glasses provides eye protection when working with feedwater chemicals.
Fire Safety PlanA fire safety plan includes the locations of fire alarms, fire extinguishers, the main electrical breaker, fire main, and exits for each area of the facility.
Lockout/TagoutLockouts and tagouts are applied to equipment to prevent injury from energized circuits and equipment operation during maintenance and repair.